Spring-motor indicator



Jan. 26 1926.

M. WEIL SPRING MOTOR INDICATOR Original Filed Jail. 6. 1921 5] numtozMax/m/Wam We 'w,

Wu new as M14 5 as mau WTMM Patented Jan. 26, 1926.

UNITE r orrics.

MAXIMILIAN'WEIL, 93? NEW YORK. Y.

SPRING-MOTOR INDICATOR.

Application filed January 6, 1921, Serial No. 435,541.

To all whom it may concern:

Be it known that I, MAXiMILIAN VVEiL, a citizen of the United States,and resident of New York city, in the. county of New York and State ofNew York, have invented certain new and useful. Improvements inSpring-Motor Indicators, of which the following is a specification.

My invention relates to speed motor indi- "ators, and particularly todevices responsive to the displacement of the spring of the motor, orother tension element, under varying conditions of use, whereby thestate of the spring or equivalent will be indicated or ascertained.

in accordance with the principle of my invention, the displacement of aportion of the spring or other tension element is utilized to controlthe means for indicating the state of the spring or tension element.Applying the principle of my invention to the ordinary coiled spring,and utilizing the variation in reluctance eifected by the displacementof the spring under wholly or partially wound conditions, a useful embodiment comprises a magnetic element having the path of its fluxtraversed by one or more portions of the spring and an indicatorresponsive to the variations of flux to indicate the extent to which thespring has been wound. Preferably, the magnetized element is positionedrelatively to the coiled spring whereby the variation in reluctance isrendered a maximum for a given change in winding of the spring, and withthis effect in view, the magnitized element may be in the form of amagnetic bridge having its free arms directed symmetrically with respectto an axis of the spring and thereby effect a flux passing transverselyto the sur faces of portions of the coils of the spring. Thus, as thespring is wound, the proportion of the portion thereof toward the conter of the spring is increased, and conversely as the spring is more andmore unwound, the proportion of the portion of the spring toward thecenter of the spring is decreased- Under the first condition, i. e.,nearly fully wound condition, the reluctance of the mag netic path isrelatively small, whereas under the second condition, i. e., nearlyunwound condition, the reluctance of the path is relatively high.

The indicating means may comprise a pointer controlled by a magnetizedor polarltenewed April 8, 1925.

ized element responsive to the variations in reluctance.

-.My invention is applicable as an indicating device generally, and ifdesired, suitable record ing means may be employed to make a record ofthe varying conditions of the displacement of the tension member onsuitable recording material.

My invention is particularly advantageous in respect to spring motors ofphonographs and other talking machines, wherein the actuating spring isusually encased in a fluid tight housing, since my invention does notrequire any change or modification in the construction or arrangement ofthe spring and its associated parts, except that the face of the housingon the side toward the magnetized element be made of non-magneticmaterial.

My invention is especially suitable for phonographs and talkingmachines, or the like, which are actuated by coils or other springs, toapprise the operator of the extent or degree of the winding or actuatingcondition of the spring, and thus preclude slowing down of the turntable'while play ing a record. My invention also obviates over-windingof the spring, attendant pos sibly with rupturing or snapping thespring.

Other features and objects of my invention will be more fully understoodfrom the following description and the accompanying drawings, in whichFig. 1 is a top plan view of one form of my invention as applied to aspring motor;

Fig. 2 is a detail schematic view showing certain parts of the saidmodification under more fully wound condition of the spring; and

Fig. 3 is a detail schematic view showing the same under less fullywound condition of the spring.

The present application is a substitute for my prior application, SerialNo. 78,853, filed Feb. 17, 1916. I

Referring to the drawings, the permanent magnet 1 is provided with thepole pieces 2, 3, shown as substantially parallel strips of magneticmaterial. The polarity of the ends of said pole pieces 2, 3, which aredireeted toward the motor spring, are indicated by N and S respectivelynorth and south polarity, and similarly the polarity of the ends of saidpole pieces 2, 3, which control the magnetically responsive element (tobe more fully described hereinafter) are indicated by N and S,respectively north and south polarities. Across the last two named endsoi said pole pieces 2, 3, is arranged the support at, of brass or othernon-magnetic material, for the magnetically responsive element 5, shownas polarized with its north polarity at N and its south porality at SFhe element 5 is suitably pivoted on the support 4. and L-shaped arm 6,also of brass or other suitable non-magnetic material. The indicator 7is suitably controlled by the magnetically responsive element 5, as byconnecting said indicator directly to the S end of the same.

The housing 8 contains the coiled spring 9 as in approved tonns of motorsprings for phonographs, and the pole pieces 2, 3 are brought closelyadjacent an end face of said housing 8, leaving a very small air gap 9between said face and the ends of said pole pieces 9,, 3. Such endpieces of the housing 8 should be formed of noi'i-magnet-ic material, orat least a portion of said end face in close proximity to said polepieces should be of non-magnetic material. Means are provided fornormally tending to move said magnetically responsive element 5 to acertain indication on the dial and in the drawing I have shown thespring 10 normally tending to move the indicator 7 toward the indicationStop on the dial 11. In this particular embodiment, the indicator 7 ispivotally mounted, and the dial 11 is radial in extent, and is shownbearing the indication Stop at one terminal and the indi :1- tion lVindat the oppositoterminal with scale markings extending from zero to amaximum of 100.

Thus, under tightly wound conditions of thespring 9, as indicated inFig. 2, the reluctance oi the path of the flux across the air gap 9 willbe relatively low, ant. accordingly the flux passing from the end N o'tpole piece 3 to the end S" ot the pole piece 2, will be relativelydecreased, and accordingly the force of the flux of the path N", S onthe magnetically responsive element 5 will be reduced, whereby thespring 10 will move the indicator 7 to the full line position shown inFig. 1. Under less tightly wound conditions oi the spring, as indicatedin Fig. 3, the reluctance o'lithe path ot the in from the end N of polepiece 3 to the end S of pole piece will be increased and the intensityof the" flux from the end N to the end S will be increased, therebycausing the magnetically responsive element 5 to move toward thedot-and-dash line 7 shown on Fig. 1, which last named position 7indicates the completely unwound condition of the spring 8. Intermediateunwound conditions of the spring will cause the indicator 7 to assumepositions between its Full line and. its dot-and-dash position.

at will be clear that equivalent means may be substituted for thepermanent magnet l to provide the relation set forth above, and that thepole pieces 2, 3, may be constructed and arranged with relation to themotor spring or other tension member and the magnetically respons'veindicator or other element. By directing two ends oi the pole pieces, 2,3, in close proximity to the motor spring, the reluctance of the flux.path passing through said ends is varied to a high degree, therebyeffecting a corresponding high resultant movement of the magneticallyresponsive element.

It will also be noted that the indicator may be mounted other thanpivotally to sccure the desired indications, and that the indications onthe scale may be chosen in accordance with the results to be attained,as by subdividing the ran e oi the scale by the indications 1 record, 2record, etc. or by indications based on the s cs or lengths ofper'lorinzmce ot' the records.

it will be observed that the actuating tension member may be of variousforms other than or" a coil, and that it may be positioned in anydesired plane with respect to the horizontal; also, that the scale orindicator may be positioned in any desired plane and the magnetizedelement arranged accord ingly to secure the objects of the invention.

Whereas I have described my invention by reference to specific formsthereof, it is understood that many changes and modifica tions may bemade without departing from my invention.

I claim:

1. An indicator for a spring, said indi cator being. provided with meansfor cstalr lishing a ticld olimagnctic iorce extending within a portionof the spring and indicating means responsive to the variation oireluctance etYe-cted by the extent oi displacement of the spring.

2. an indicator for a motor spring, the same being provided with amagnetic licld extending within a portion of the motor spring andindicating means responsive to the variation of reluctance cli'ected bythe extent of displacement of the motor spring 3. An indicator for amotor spring, the same being provided with a magnetic ticld extendingwithin a portion of the motor spring and indicating means responsive tothe variation of reluctance cllc'cted by the variation. of the effectiveamount of the mass 015 the spring disposed in said magnetic field.

4. The combination with a tension spring. of means provided with amagnetic field extending within a portion of the said spring andresponsivev to the variation in reluctance effected by the extent ofdisplzmement of said tension member.

5. The con'ibination with a tension spring,

lit

of means provided with a magnetic field extending within a portion ofsaid spring and responsive to the variation in reluctance effected byvariation in the elfective amount of the mass of said spring disposed insaid magnetic field.

(5. The combination with a coiled tension spring, of indicating meansprovided with a magnetic field extending within a portion of said springand responsive to the variation in reluctance effected by the extent ofdisplacement of the coils of said coiled spring embraced in saidmagnetic field.

7. The combination of a motor spring and a device provided with amagnetic field extending within a portion of said spring and responsiveto the variation in reluctance effected by the extent of coiling anduncoiling of said motor spring.

8. The combination of a coiled motor spring and a device provided with amagnetic field extending within a portion of said spring and responsiveto the variations in reluctance effected by the extent of coiling anduncoiling of said motor spring.

9. The combination with a motor spring, of an indicating device providedwith a magnetic field passing through a portion of the spring of saidmotor and comprising an indicating element responsive to the displacement of said sprin 10. The combination with a spring motor, of anindicating device provided with a magnetic field passing through aportion of the spring of said motor and comprising an element responsiveto the variation in reluctance effected by the extent of displacement ofsaid spring.

'11. The combination with, a motor having a coiled spring, of anindicating device provided with a magnetic field passing through aportion of said coiled spring and comprising an element responsive tothe variation in reluctance effected by the variation. in the number ofcoils of said coiled spring disposed in the effective region of themagnetic field.

12. The combination of a motor spring, means for establishing a magneticfield in tercepting at least a portion of said spring and meansresponsive to the variation in reluctance effected by the displacementof said spring within the magnetic field.

13. The combination with a spring mo tor, of an indicating deviceprovided with a magnetic field passing through a portion of the springof said motor and comprising a magnetically responsive element disposedin magnetic relation to the spring of said motor.

1 1. The combination with a coiled motor spring, of means forestablishing a magnetic field transversely intercepting at least aportion of a coil of said spring and an ele ment responsive to thevariation in relnctance effected by the displacement of said coilportion within the magnetic field;

15. The combination with a coiled spring, of a means establishingmultiple magnetic fields, one of which intercepts a portion of saidspring and means responsive to the variations in reluctance effected bythe displacement of said spring portion within said one magnetic field.

16. The combination with a displaceable member comprising magneticmaterial, of a magnetized element having multiple flux parts, one ofsaid fiux paths traversing a portion of said member to thereby vary thereluctance of said path, and a'resiliently controlled element responsiveto the changes in reluctance of said one path.

17. The combination with a spring having one end secured to a centralwinding shaft, of a magnetized element having two portions substantiallysymmetrically related to said shaft and indicating means controlled bythe variation of flux effected by displace ment of said spring.

18. The combination with a motor spring, of means comprising twomagnetized portions disposed adjacent said spring and means responsiveto the variation in reluctance efiected by the extent of displacement ofa portion of said spring within the magnetic field established by saidmagnetized portions;

19. The combination with a motor spring, of magnetized means having apole disposed toward and adjacent a portion of said motor spring andmeans including a polarized clement responsive to variation inreluctance effected by the extent of displacement of said spring portionwithin the magnetic field.

20. The combination with a. displaceablc laminated member comprisingmagnetic material, of means provided with a magnetic field traversingone or more laminm of said member and responsive to .the variation inreluctance efiected by the variation in distance between said laminae. 1

21. The combination with a displaccablc laminated member comprisingmagnetic material and means provided with a magnetic field traversingone or more laminae of said member and responsive to the variation inreluctance due to density of magnetic ma terial embraced in the magneticfield.

22. The combination with a motor spring, of a magnetic element providedwith a magnetic field extending to a portion of said motor spring, saidmagnetic element being responsive to change in reluctance effected upondisplacement of said spring and resilient means acting in opposition tothe magnetic forces imposed upon said element.

-3. The combination with a motor spring, of a device responsive tovariations in reluctance and comprising a magnetized -ele ment havingtwo portions directed towards said motor spring, a polarized elementmagnetically related to two other portions of said magnetized element,an indicator controlled by said polarized element, a scale for saidindicator and a spring normally tending to move said indicator to acertain indication on said scale.

24-. The combination with a motor spring, of a device responsive tovariations in reluctance and comprising a magnetized element having twoportions directed towards said motor spring, a polarized elementmagnetically related to two other portions of said magnetized element, apivoted indicator controlled by said polarized element, a radial scalefor said indicator, and a spring normally tending to move said indicatorto a certain indication on said scale.

25. The combination of displaceable mag netic plates, n cans providedwith a magnetic field extending within a portion of certain of saidplates and responsive to variations in reluctance effected by the extentof displacement of said certain plates'in said magnetic field.

26. The combination of displaceable magnetic plates, means provided witha magnetic field passing through said magnetic plates and responsive tovariations in reluctance effected by the extent of displacement of oneor more of said plates in said magnetic field.

27. The combination with a motor mechanism con iprising a memberdisplaceable in response to work done and containing magnetic material,of means for creating a magnetic field about said member and anindicating device responsive to the variation in reluctance due to thedisplacement of said member.

28. The combination of means for creating a magnetic field, motormechanism comprising a member displaceable in response to worlr done andcapable of varying the reluctance of said magnetic field and indicatingmeans responsive to the variation in reluctance due to the displacementof said member.

29. The combination with relatively movable parts of magnetic material,of means provided with a magnetic field extending to certain of saidparts and means responsive to variations in reluctance in said fieldresulting from movement of said certain parts.

30. The combination with relatively movable parts of magnetic material,of means for creating a magnetic field extending to certain of saidparts and magnetic means responsive to variations in reluctance in saidfield resulting from relative movement of said certain parts.

Signed at New York city in the county of New York and State of New Yorkthis 1st day of January A. D. 1921.

MAXIMILIAN VEIL.

